|
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Category:MEETING MINUTES & NOTES--CORRESPONDENCE
MONTHYEARML20198J1651998-12-15015 December 1998
Summary of 981118 Meeting with Util in Rockville,Md Re Ampacity Validation Analyses.List of Attendees & Handouts Provided by Util Encl
ML20216G5171997-09-0404 September 1997
Summary of 970805 Meeting W/Util Re Thermo-Lag Corrective Actions at Peach Bottom & Limerick.List of Attendees & Meeting Handouts Encl
ML20140F3561997-04-30030 April 1997
Summary of 970414 Meeting W/Util in Rockville,Md to Discuss Issues Associated W/Use of Thermo-Lag Fire Barrier Matl at Plants.Meeting Attendees & Handouts Encl
ML20138C8081997-04-25025 April 1997
Summary of 970410 Meeting W/Peach Bottom Atomic Power Station in Rockville,Md Re Planned Construction of Sf Dry Cask Storage Facility for Units 2 & 3.List of Attendees & Copy of PECO Meeting Handout Encl
ML20133G1401997-01-10010 January 1997
Summary of 961025 Meeting W/Peco in Delta,Pa Re Status of Licensing Actions Associated W/Plants.List of Attendees & Copy of Presentation Matl Encl
ML20058G7841993-12-0202 December 1993
Summary of 931103 Meeting W/Util in Rockville,Md Re Evaluation of Core Shroud Indications at Plant.List of Attendees & Meeting Handouts Encl
ML20058F0451993-11-24024 November 1993
Summary of 931103 Meeting W/Util in Rockville,Md Re Submittal Plans for Cost Beneficial Licensing Actions & to Get Feedback from NRC Staff.List of Attendees Encl
ML20059B0971993-10-20020 October 1993
Summary of Operating Reactors Events Meeting 93-39 on 931013
ML20058N0011993-09-30030 September 1993
Summary of 930902 Meeting W/Peco Re Installation of Certain Planned analog-to-digital Retrofit Mods During Scheduled Sept 1993 Facility Outage
ML20058M1861993-09-22022 September 1993
Summary of Operating Reactors Events Meeting 93-35 on 930915
ML20057B4771993-09-15015 September 1993
Summary of 930824 Meeting W/Util Re Implementation of dual-site Senior Reactor Limited to Fuel Handling (Lsr) Program.List of Meeting Attendees & Meeting Handouts Encl
ML20057A5691993-09-0202 September 1993
Summary of 930809 Meeting W/Util in Wayne,Pa Re Various Licensing Activities Re Plants.List of Attendees Encl
ML20056F8171993-08-0909 August 1993
Summary of Operating Reactors Events Meeting 93-29 on 930804.List of Attendees & Viewgraphs Encl
ML20128H6211993-02-0808 February 1993
Summary of 921123-24 Meeting in King of Prussia,Pa Re Positions on Operator Licensing Issues & to Solicit Input
ML20126K5111992-12-30030 December 1992
Summary of Operating Reactors Events Meeting 92-022 on 921223.Reactor Scram Statistics for Wk Ending 921230 Encl & List of Attendees Encl
ML20126F1241992-12-10010 December 1992
Summary of 921201 Meeting W/Util in Rockville,Md Re Various Licensing Activities.List of Attendees Encl
ML20247K0901989-05-23023 May 1989
Summary of 890517 Meeting W/Inpo Re Similarities & Differences Between Performance Indicator Programs.Detailed Discussion Encl
ML20247K1011989-05-16016 May 1989
Summary of 890517 Meeting W/Inpo in Bethesda,Md Re Similarities & Differences Between INPO & NRC Performance Indicators
ML20195H0271988-11-25025 November 1988
Summary of Operating Reactor Events Meeting 88-46 on 881122
ML20205C9601988-10-20020 October 1988
Summary of 881019 Meeting W/Util in Rockville,Md Re Util 880907 Submittal Re Protection from Degraded Voltage Conditions.List of Attendees & Agenda Encl
ML20151M0321988-07-28028 July 1988
Summary of 880519 Meeting W/Util in Rockville,Md to Discuss Licensee Plan for Facility Restart.List of Attendees, Agenda & Viewgraphs Encl
ML20195B2211988-06-0808 June 1988
Summary of Operating Reactors Events Meeting 88-23 on 880607.List of Attendees,Events Discussed & Summary of Reactor Scrams Encl
ML20196D3841988-02-10010 February 1988
Summary of Operating Reactors Events Meeting 88-05 on 880202 on Events Since 880126 Meeting.List of Attendees, Events Discussed,Tabulation of long-term Followup Assignments & 10CFR50.72 Rept Tabulation & Summary Encl
ML20196A2161988-01-0505 January 1988
Trip Rept of Commissioner Carr & T Elsasser 871215 Site Visit to Util & 871216 Attendance at Region I Periodic Regional Resident Counterpart Meeting
IA-88-478, Trip Rept of Commissioner Carr & T Elsasser 871215 Site Visit to Util & 871216 Attendance at Region I Periodic Regional Resident Counterpart Meeting1988-01-0505 January 1988
Trip Rept of Commissioner Carr & T Elsasser 871215 Site Visit to Util & 871216 Attendance at Region I Periodic Regional Resident Counterpart Meeting
IR 05000277/19850231987-09-14014 September 1987
Summary of 870730 Meeting W/Util at Site Re Containment Leakage Testing,Fire Protection Issues,Insp Repts 50-277/85-23 & 50-278/85-23 & Util 860915 & 1010 Amended Requests for Changes to Tech Specs.Attendance List Encl
ML20239A0231987-09-10010 September 1987
Summary of Operating Reactor Events Meeting 87-30 on 870908, Re Briefing Senior Managers from Nrr,Res,Aeod & Regional Ofcs on Events Which Occurred Since 870825 Meeting.Attendees List,Summary of Reactor Scrams & Viewgraphs Encl
ML20236F2181987-07-26026 July 1987
Summary of 870715 Meeting W/Util in Bethesda,Md Re Status of Util Recovery Program for Facility Operations.List of Attendees,Viewgraphs & Meeting Transcript Encl
ML20215C8721987-06-0808 June 1987
Summary of Operating Reactors Events Meeting 87-10 on 870406 Re Events Which Occurred Since 870330 Meeting.List of Attendees,Events Discussed & Significant Elements of Events & Summary of Reactor Scrams & Significant Events Encl
ML20214J4991987-05-15015 May 1987
Summary of Operating Reactors Events Meeting 87-09 on 870330 Re Events Which Occurred Since 870316 Meeting.List of Attendees,Events Discussed & Significant Elements of Events & Summary of Events Presented Encl
ML20214P9371986-11-21021 November 1986
Summary of Operating Reactor Events Meeting 86-39 on 861110.List of Attendees,Events Discussed & Significant Elements of Events Encl
ML20213F0641986-11-10010 November 1986
Summary of Operating Reactors Events Meeting 86-36 on 861020.List of Attendees,Events Discussed,Significant Events Data Sheet,Summary of Scrams W/Complications & Status of Previous & New Assignments Encl
ML20215G0561986-10-0707 October 1986
Summary of 860911 Meeting W/Bwr Owners Group in Bethesda,Md Re Strawman Generic Requirements for Enhancing BWR Containment Performance in Severe Accident Conditions.Second Technical Exchange Meeting in mid-Nov 1986 Proposed
ML20212K3101986-08-13013 August 1986
Summary of 860708 Meeting W/Util in Bethesda,Md Re Topical Reload Program for Plant.List of Attendees,Proposed Meeting Agenda & Slide Presentation Encl
ML20205Q4541986-05-13013 May 1986
Summary of 860506 Meeting W/Util in Bethesda,Md Re Special Circumstances for Util Requested Exemptions to 10CFR50, App R
ML20197F7721986-05-0808 May 1986
Summary of Operating Reactors Events Meeting 86-15 on 860505.List of Attendees,Events Discussed & Status of Previous Assignments Encl
ML20197F1691986-05-0808 May 1986
Summary of Operating Reactors Events 860428 Meeting W/Listed Divs Re Chernobyl Nuclear Accident & Events at Us Reactors
ML20203M9431986-04-25025 April 1986
Summary of Operating Reactors Events Meeting 86-13 on 860421 Re Events Occurring Since 860414 Meeting.Attendance List, Viewgraphs & Supporting Documentation Encl
ML20203P6801986-04-22022 April 1986
Summary of 860410 Meeting W/Project Managers & Utils in Bethesda,Md Re Automated Tracking,Integrated Schedules & Tech Specs.Attendees List,Viewgraphs & Meeting Agenda Encl
ML20203E8051986-04-18018 April 1986
Summary of Operating Reactors Events Meeting 86-12 on 860414 Re Events Since 860407.List of Attendees,Viewgraphs & Supporting Documentation Encl
ML20154N8751986-03-12012 March 1986
Summary of Operating Reactor Events 860310 Meeting 86-07 W/Ornl Re Events Occurring Since 860303 Meeting.Followup Review Assignments,Status of Previous Assignments,List of Attendees & Viewgraphs Encl
ML20137Y5861986-03-0404 March 1986
Summary of Nrc/Idcor 851210 Meeting Re Preliminary Results & Differences of Risk Analysis for Facilities.Viewgraphs Encl
ML20154C9931986-02-24024 February 1986
Summary of Operating Reactors Event Meeting 86-04 on 860210.List of Attendees,Briefing & Reactor Scram Summaries Encl
ML20141K0981986-01-14014 January 1986
Summary of 851219 Meeting W/Util in Bethesda,Md Re Shroud Head Bolt Cracks & RHR Wear Ring Cracks.List of Meeting Attendees & Viewgraphs Encl
ML20141K0461986-01-0808 January 1986
Summary of 851031 Meeting W/Util in Bethesda,Md Re IGSCC Cracking.List of Meeting Attendees & Viewgraphs Encl. Viewgraphs Withheld
ML20151N3021985-12-19019 December 1985
Summary of 851216 Operating Reactor Events Meeting 85-27. Attendance List,Viewgraphs of Events Discussed,Significant Event Elements,Assignment of Followup Review Responsibility & Status of Previous Assignments Encl
ML20137X5091985-11-29029 November 1985
Summary of Operator Reactor Events Meeting 85-24 on 851125 Re Briefing of Ofc Directors & Div Directors & Representatives on Events Which Occurred Since Last Meeting on 851118.List of Attendees Encl
ML20138P0081985-10-21021 October 1985
Summary of Operating Reactors Events Meeting 85-19 on 851007 W/Ofc Directors,Div Directors & Representatives on Events Which Occurred Since Last Meeting on 851007
ML20205E7101985-10-0909 October 1985
Summary of 851001 Meeting W/Util & GE in Bethesda,Md Re Cracking Identified in 316 L Grade Stainless Steel Recirculation Outlet Safe Ends.Proprietary Viewgraphs Encl. Viewgraphs Withheld (Ref 10CFR2.790)
ML20133F9941985-10-0707 October 1985
Summary of Operating Reactors Events Meeting 85-16 on 850916 Re Briefing of Director,Div Directors & Representatives on Events Occurring Since 850909 Meeting.List of Attendees & Viewgraphs Encl
1998-12-15
[Table view]
Category:MEETING SUMMARIES-INTERNAL (NON-TRANSCRIPT)
MONTHYEARML20198J1651998-12-15015 December 1998
Summary of 981118 Meeting with Util in Rockville,Md Re Ampacity Validation Analyses.List of Attendees & Handouts Provided by Util Encl
ML20216G5171997-09-0404 September 1997
Summary of 970805 Meeting W/Util Re Thermo-Lag Corrective Actions at Peach Bottom & Limerick.List of Attendees & Meeting Handouts Encl
ML20140F3561997-04-30030 April 1997
Summary of 970414 Meeting W/Util in Rockville,Md to Discuss Issues Associated W/Use of Thermo-Lag Fire Barrier Matl at Plants.Meeting Attendees & Handouts Encl
ML20138C8081997-04-25025 April 1997
Summary of 970410 Meeting W/Peach Bottom Atomic Power Station in Rockville,Md Re Planned Construction of Sf Dry Cask Storage Facility for Units 2 & 3.List of Attendees & Copy of PECO Meeting Handout Encl
ML20133G1401997-01-10010 January 1997
Summary of 961025 Meeting W/Peco in Delta,Pa Re Status of Licensing Actions Associated W/Plants.List of Attendees & Copy of Presentation Matl Encl
ML20058G7841993-12-0202 December 1993
Summary of 931103 Meeting W/Util in Rockville,Md Re Evaluation of Core Shroud Indications at Plant.List of Attendees & Meeting Handouts Encl
ML20058F0451993-11-24024 November 1993
Summary of 931103 Meeting W/Util in Rockville,Md Re Submittal Plans for Cost Beneficial Licensing Actions & to Get Feedback from NRC Staff.List of Attendees Encl
ML20059B0971993-10-20020 October 1993
Summary of Operating Reactors Events Meeting 93-39 on 931013
ML20058N0011993-09-30030 September 1993
Summary of 930902 Meeting W/Peco Re Installation of Certain Planned analog-to-digital Retrofit Mods During Scheduled Sept 1993 Facility Outage
ML20058M1861993-09-22022 September 1993
Summary of Operating Reactors Events Meeting 93-35 on 930915
ML20057B4771993-09-15015 September 1993
Summary of 930824 Meeting W/Util Re Implementation of dual-site Senior Reactor Limited to Fuel Handling (Lsr) Program.List of Meeting Attendees & Meeting Handouts Encl
ML20057A5691993-09-0202 September 1993
Summary of 930809 Meeting W/Util in Wayne,Pa Re Various Licensing Activities Re Plants.List of Attendees Encl
ML20056F8171993-08-0909 August 1993
Summary of Operating Reactors Events Meeting 93-29 on 930804.List of Attendees & Viewgraphs Encl
ML20128H6211993-02-0808 February 1993
Summary of 921123-24 Meeting in King of Prussia,Pa Re Positions on Operator Licensing Issues & to Solicit Input
ML20126K5111992-12-30030 December 1992
Summary of Operating Reactors Events Meeting 92-022 on 921223.Reactor Scram Statistics for Wk Ending 921230 Encl & List of Attendees Encl
ML20126F1241992-12-10010 December 1992
Summary of 921201 Meeting W/Util in Rockville,Md Re Various Licensing Activities.List of Attendees Encl
ML20247K0901989-05-23023 May 1989
Summary of 890517 Meeting W/Inpo Re Similarities & Differences Between Performance Indicator Programs.Detailed Discussion Encl
ML20247K1011989-05-16016 May 1989
Summary of 890517 Meeting W/Inpo in Bethesda,Md Re Similarities & Differences Between INPO & NRC Performance Indicators
ML20195H0271988-11-25025 November 1988
Summary of Operating Reactor Events Meeting 88-46 on 881122
ML20205C9601988-10-20020 October 1988
Summary of 881019 Meeting W/Util in Rockville,Md Re Util 880907 Submittal Re Protection from Degraded Voltage Conditions.List of Attendees & Agenda Encl
ML20151M0321988-07-28028 July 1988
Summary of 880519 Meeting W/Util in Rockville,Md to Discuss Licensee Plan for Facility Restart.List of Attendees, Agenda & Viewgraphs Encl
ML20195B2211988-06-0808 June 1988
Summary of Operating Reactors Events Meeting 88-23 on 880607.List of Attendees,Events Discussed & Summary of Reactor Scrams Encl
ML20196D3841988-02-10010 February 1988
Summary of Operating Reactors Events Meeting 88-05 on 880202 on Events Since 880126 Meeting.List of Attendees, Events Discussed,Tabulation of long-term Followup Assignments & 10CFR50.72 Rept Tabulation & Summary Encl
IR 05000277/19850231987-09-14014 September 1987
Summary of 870730 Meeting W/Util at Site Re Containment Leakage Testing,Fire Protection Issues,Insp Repts 50-277/85-23 & 50-278/85-23 & Util 860915 & 1010 Amended Requests for Changes to Tech Specs.Attendance List Encl
ML20239A0231987-09-10010 September 1987
Summary of Operating Reactor Events Meeting 87-30 on 870908, Re Briefing Senior Managers from Nrr,Res,Aeod & Regional Ofcs on Events Which Occurred Since 870825 Meeting.Attendees List,Summary of Reactor Scrams & Viewgraphs Encl
ML20236F2181987-07-26026 July 1987
Summary of 870715 Meeting W/Util in Bethesda,Md Re Status of Util Recovery Program for Facility Operations.List of Attendees,Viewgraphs & Meeting Transcript Encl
ML20215C8721987-06-0808 June 1987
Summary of Operating Reactors Events Meeting 87-10 on 870406 Re Events Which Occurred Since 870330 Meeting.List of Attendees,Events Discussed & Significant Elements of Events & Summary of Reactor Scrams & Significant Events Encl
ML20214J4991987-05-15015 May 1987
Summary of Operating Reactors Events Meeting 87-09 on 870330 Re Events Which Occurred Since 870316 Meeting.List of Attendees,Events Discussed & Significant Elements of Events & Summary of Events Presented Encl
ML20214P9371986-11-21021 November 1986
Summary of Operating Reactor Events Meeting 86-39 on 861110.List of Attendees,Events Discussed & Significant Elements of Events Encl
ML20213F0641986-11-10010 November 1986
Summary of Operating Reactors Events Meeting 86-36 on 861020.List of Attendees,Events Discussed,Significant Events Data Sheet,Summary of Scrams W/Complications & Status of Previous & New Assignments Encl
ML20215G0561986-10-0707 October 1986
Summary of 860911 Meeting W/Bwr Owners Group in Bethesda,Md Re Strawman Generic Requirements for Enhancing BWR Containment Performance in Severe Accident Conditions.Second Technical Exchange Meeting in mid-Nov 1986 Proposed
ML20212K3101986-08-13013 August 1986
Summary of 860708 Meeting W/Util in Bethesda,Md Re Topical Reload Program for Plant.List of Attendees,Proposed Meeting Agenda & Slide Presentation Encl
ML20205Q4541986-05-13013 May 1986
Summary of 860506 Meeting W/Util in Bethesda,Md Re Special Circumstances for Util Requested Exemptions to 10CFR50, App R
ML20197F7721986-05-0808 May 1986
Summary of Operating Reactors Events Meeting 86-15 on 860505.List of Attendees,Events Discussed & Status of Previous Assignments Encl
ML20197F1691986-05-0808 May 1986
Summary of Operating Reactors Events 860428 Meeting W/Listed Divs Re Chernobyl Nuclear Accident & Events at Us Reactors
ML20203M9431986-04-25025 April 1986
Summary of Operating Reactors Events Meeting 86-13 on 860421 Re Events Occurring Since 860414 Meeting.Attendance List, Viewgraphs & Supporting Documentation Encl
ML20203P6801986-04-22022 April 1986
Summary of 860410 Meeting W/Project Managers & Utils in Bethesda,Md Re Automated Tracking,Integrated Schedules & Tech Specs.Attendees List,Viewgraphs & Meeting Agenda Encl
ML20203E8051986-04-18018 April 1986
Summary of Operating Reactors Events Meeting 86-12 on 860414 Re Events Since 860407.List of Attendees,Viewgraphs & Supporting Documentation Encl
ML20154N8751986-03-12012 March 1986
Summary of Operating Reactor Events 860310 Meeting 86-07 W/Ornl Re Events Occurring Since 860303 Meeting.Followup Review Assignments,Status of Previous Assignments,List of Attendees & Viewgraphs Encl
ML20137Y5861986-03-0404 March 1986
Summary of Nrc/Idcor 851210 Meeting Re Preliminary Results & Differences of Risk Analysis for Facilities.Viewgraphs Encl
ML20154C9931986-02-24024 February 1986
Summary of Operating Reactors Event Meeting 86-04 on 860210.List of Attendees,Briefing & Reactor Scram Summaries Encl
ML20141K0981986-01-14014 January 1986
Summary of 851219 Meeting W/Util in Bethesda,Md Re Shroud Head Bolt Cracks & RHR Wear Ring Cracks.List of Meeting Attendees & Viewgraphs Encl
ML20141K0461986-01-0808 January 1986
Summary of 851031 Meeting W/Util in Bethesda,Md Re IGSCC Cracking.List of Meeting Attendees & Viewgraphs Encl. Viewgraphs Withheld
ML20151N3021985-12-19019 December 1985
Summary of 851216 Operating Reactor Events Meeting 85-27. Attendance List,Viewgraphs of Events Discussed,Significant Event Elements,Assignment of Followup Review Responsibility & Status of Previous Assignments Encl
ML20137X5091985-11-29029 November 1985
Summary of Operator Reactor Events Meeting 85-24 on 851125 Re Briefing of Ofc Directors & Div Directors & Representatives on Events Which Occurred Since Last Meeting on 851118.List of Attendees Encl
ML20138P0081985-10-21021 October 1985
Summary of Operating Reactors Events Meeting 85-19 on 851007 W/Ofc Directors,Div Directors & Representatives on Events Which Occurred Since Last Meeting on 851007
ML20205E7101985-10-0909 October 1985
Summary of 851001 Meeting W/Util & GE in Bethesda,Md Re Cracking Identified in 316 L Grade Stainless Steel Recirculation Outlet Safe Ends.Proprietary Viewgraphs Encl. Viewgraphs Withheld (Ref 10CFR2.790)
ML20133F9941985-10-0707 October 1985
Summary of Operating Reactors Events Meeting 85-16 on 850916 Re Briefing of Director,Div Directors & Representatives on Events Occurring Since 850909 Meeting.List of Attendees & Viewgraphs Encl
ML20133E5661985-10-0303 October 1985
Summary of 850905 & 17 Meetings W/Util in Bethesda,Md Re Recent Detection of IGSCC on Recirculation & RHR Sys Piping & Cracks on Core Spray Line,Respectively.List of Participants & Presentation Encl
ML20133E4631985-10-0101 October 1985
Summary of Operating Reactors Events Meeting 85-17 on 850923.List of Attendees & Viewgraphs Encl
1998-12-15
[Table view] |
Text
.. . ._ -
a Docket Nos. 50-277/278 DISTRIBUTION PD#2 Reading
' JAN 141986 *W1K NRC PDR GGears DMu11er LICENSEE: Philadelphia Electric Company local PDR EJordan NRC Participants DELD FACILITY: Peach Bottom Atomic Power Station, Units 2 and 3 ACPS (10)
BGrimes
SUBJECT:
SUMMARY
OF MEETING WITH PHILADELPHIA ELECTRIC COMPANY CONCERNING SHROUD HEAD BOLT CRACKS AND RHR WEAR RING CRACKS
Introduction:
On December 19, 1985, the NRC staff met with representatives from the Philadelphia Electric Company (the licensee or PECo) in Bethesda, Maryland to discuss the recent detection of intergranular stress corrosion cracking j (IGSCC) on shroud head bolts and residual heat removal (RHR) wear rings.
. A list of the meeting participants for this meeting is included as Enclosure 1.
Discussion:
The NRC staff requested that the licensee present its recent findinas i
concerningtheIGSCCcracksonthesteamseparatorholddownbolts(shroud i head bolts) and the wear ring cracks on the RHR pumps. This meeting followed several telephone conference calls between the NRR staff, the Region and the licensee. The licensee's presentation, which included
- discussions by both PECo and General Electric personnel, is summarized in Enclosure 2. The following pertinent points require emphasis
- (1) cracked wear rings have been replaced on the affected RHR Pumps and the Region and the licensee have been discussing the timing of the completed wear ring inspection program at Unit 2; (2) suitable long-term wear ring replacement material is currently under review by the licensee and a long term fix is l still under PECo review; and (3) replacement of 24 out of 48 shroud head bolts is currently underway and the licensee's supporting analysis for this replacement activity will be provided to the NRC prior to start up as part of the NRR staff's Unit 3 IGSCC review.
Ogipinal cig::31by]
Gerald E. Gears, Project Manager BWR Project Directorate #2 Division of BWR Licensing
Enclosures:
- 1. List of Attendees for Meeting
- 2. The Licensee's Summary i
cc w/ enclosures:
See next page i DB :PD#2 #2 SN :rc 9601220211 960 4
01/ lI/86 27
//3/86 PDR ADOCK 0 p
P
Mr. E. G. Bauer, Jr. Peach Bottom Atomic Power Station, Philadelphia Electric Company Units 2 and 3 CC*
Pr. Eugene J. Bradley Mr. R. A. Heiss, Coordinator .
~
Assistant General Counsel Pennsylvania State Clearinghouse Philadelphia Electric Company Governor's Office of State Planning 2301 Market Street and Development Philadelphia, Pennsylvania 19101 P.O. Box 1323 Harrisburg, Pennsylvania 17120 Troy B. Conner, Jr., Esq.
1747 Pennsylvania Avenue, N.W. Mr. Thomas M. Gerusky, Director Washington, D.C. 20006 Bureau of Radiation Protection Pennsylvania Department of Thomas A. Deming, Esq. Environmental Resources Assistant Attorney General P.O. Box 2063 Department of Natural Resources Harrisburg, Pennsylvania 17120 Annapolis, Maryland 21401 Mr. Albert R. Steel, Chairman Philadelphia Electric Company Board of Supervisors l ATTN: Mr. R. Fleishmann Peach Bottom Township
. Peach Bottom Atomic R. D. #1 Power Station Delta, Pennsylvania 17314 Delta, Pennsylvania 17314 Mr. M. J. Cooney, Superintendent Generation Division - Nuclear Philadelphia Electric Company 2301 Market Street Philadelphia, Pennsylvania 19101 Mr. Anthony J. Pietrofitta, General Manager Power Production Engineering Atlantic Electric i P. O. Box 1500 1199 Black Horse Pike
- Pleasantville, New Jersey 08232 Resident Inspector U.S. Nuclear Regulatory Commission Peach Bottom Atomic Power Station P.O. Box 399 Delta, Pennsylvania 17314 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406
Enclosure 1 .
Name Organization G. E. Gears NRR/ DBL /PD#2 W. M. Alden PEco
, J. J. Zudans I&E/DEPER #
J. Diletto PECo (
G. J. Beck PECo ,
i ,
W. J. Brady PECo H. R. Adendroth Atlantic Electrical J. Moskowitz PECo l T. Johnson Region 1, SRI l J. Davenport PECo W. F. Casey PECo I
A. J. Wasong PECo W. J. Collins I&E/EGCG l W. S. Hazelton NRR/ DBL /ENG D. E. Delwiche GE j D. W. Diefenderfer GE S. Ranganath lI GE
, R. E. Lagate GE G. Neils NSP/BWROG-IGSCC S. Reynolds, Jr. Region 1 l
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I 250X t INTERGRANULAR FRACTURE OF PEACH BOTTOM-3 SHROUD HEAD BOLY. (NEAR OUTER EDGE OF ALLOY 600 BOLT SHAFT).
v.w-. . _ _ . . , . _ - - . - - - __. _ . _ . _ - . . . . _ _ _ _ - _ _ _ _ _ _ _ _ . _ . _ _ _ _ - - . . . _ . . . . - - . - - - - . . , _ _ _ _ - _ _ _ . .
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OPTICAL MICROSCOPIC VIEWS OF INTERGRANULAR CRACKING NEAR CENTER OF PEACH BOTTOM-3 SHROUD HEAD BOLT NOTE:
4 o intergranular fracture mode
- o secondary cracking o only slight oxide buildup l o " sensitized microstructure o no evidence of fatigue l 0 no plastic deformation evident I
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W_-----_..,..------ , - , - _ _ _ , , , , _ -- _
CONCLUSION THE FAILDRE EXAMINATION HAS REVEALED THE FOLLOWING FACTS: ;
A. MULTIPLE INITIATION SITES IN CREVICE FORMED BY WELDED COLLAR AND BOLT SHAFT.
B. TYPICAL MILL-ANNEALED ALLOY 600 SUSCEPTIBLE TO IGSCC.
C. N0 GROSS PLASTIC DEFORMATION OBSERVED.
D. INTERGRANULAR CRACK PROPAGATION MODE (BY OPTICAL MICROSCOPY AND SCANNING ELECTRON MICROSCOPY).
E. NO EVIDENCE OF FATIGUE (STRIATIONS, ETC.).
SHB FAILURE CAUSED BY CREVICE ACCELERATED INTERGRANULAR STRESS CORROSION CRACKING
l SHR0l0 WAD RnlTS 0DIRIGE o M)T ESSDiflAL C&FGBIIS o
BREAKAGE DOES l0T PREUE LOST PARIS o
ETAlllEICAL EXAMINATIGl QFPLETE
' SHROUD HEAD BOLT CRACKING ASSESSMENT STATUS o INITIAL FIELD FAILURE EVALUATION COMPLETED FOR ONE SECTION CONFIRMED IGSCC IN CREVICED ALLOY 600 SECTION .
o ADDITIONAL BOLT SECTION WILL BE EXAMINED EVALUATE INITIATION IN FILLET WELD VERIFY WATER CHEMISTRY EFFECT o INITIAL FRACTURE MECHANICS EVALUATION COMPLETE EXPECTED OPERATIONAL LOADS UTILIZED FILLET WELD RESIDUAL STRESS CRACK GROWTH EXTENT CONSISTENT WITH LABORATORY DATA FOR ALLOY 600 IN 0,2 PPM 0XYGENATED WATER
o PLANT SPECIFIC STRUCTURAL ANALYSIS COMPLETED .T0 DETERMINE MINIMUM NUMBER OF BOLTS 2 FOR NORMAL OPERATION 6 RR SIE#1 LIE BREAK LOCA 24 FOR SSE + LOCA BASED ON ANALYSIS AND PROTOTYPE TEST DATA
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HYDROGEN KATER DE4ISTRY (HWC)
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GEWERAL ELECTRIC CO.
1 Nuch:r Energy Business Opections l
ENGINEERING CALCULATION SHEET 1 NUMBER DATE SUBJECT BY EHEET OF STROCTORAL AN A LYS fS r 4 ti
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- BOLT l 75"p A 4
y AP * -
w H CoM S I N ATIO N OF LocA + SSE W -
SLvoudke.al (J g E 109 kips M - SSE Mome.wt 2 4,000 in- klN H -
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. GENERAL ELECTRIC CO.
- Nuclztr Enzrgy Business Oper:tions ENGINEERING CALCULATION SHEET
. NUMBER DATE BY SHEET OF SUBJECT bOkk S OSSOS .
. Cowst& Me.mb<-
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i EQUIED flHR OF BOLTS e NOWAL OPERATION 2 BOLTS (7.8 PSI P) e STEN 1 LIFE BREAK LOCA 6 BOLTS (32.9 PSI P) e STE#1 LIFE BREAK 214 BOLTS PLUS SSE EVENT b
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O CONCLUSIONS: .
- 1) THE WEAR RINGS FAILED BY STRESS-ASSISTED CORR 0SION CRACKING WHICH PROPAGATED FROM NUMEROUS SURFACE INDICATIONS
- 2) THE SUSEPTIBILITY OF THESE WEAR RINGS TO IGSCC WAS INCREASED DUE TO THE FOLLONING:
A) INITIATION SITES - FOLDS, LAPS AND POSSIBLE QUENCH CRACKS B) RESIDUAL OD HOOP STRESSES FROM THE SHRINK FIT C) FULL HARDNESS IN A SUSEPTIBLE MATERIAL-410SS i
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